Pass implementation object to supplemental classes by reference

Source/core/frame/DOMWindowTimers.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2013 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 22 matching lines @@
 #include "config.h"
 #include "core/frame/DOMWindowTimers.h"
 
 #include "core/events/EventTarget.h"
 #include "core/frame/DOMTimer.h"
 
 namespace WebCore {
 
 namespace DOMWindowTimers {
 
-int setTimeout(EventTarget* eventTarget, PassOwnPtr<ScheduledAction> action, int timeout)
+int setTimeout(EventTarget& eventTarget, PassOwnPtr<ScheduledAction> action, int timeout)
 {
-    return DOMTimer::install(eventTarget->executionContext(), action, timeout, true);
+    return DOMTimer::install(eventTarget.executionContext(), action, timeout, true);
 }
 
-int setInterval(EventTarget* eventTarget, PassOwnPtr<ScheduledAction> action, int timeout)
+int setInterval(EventTarget& eventTarget, PassOwnPtr<ScheduledAction> action, int timeout)
 {
-    return DOMTimer::install(eventTarget->executionContext(), action, timeout, false);
+    return DOMTimer::install(eventTarget.executionContext(), action, timeout, false);
 }
 
-void clearTimeout(EventTarget* eventTarget, int timeoutID)
+void clearTimeout(EventTarget& eventTarget, int timeoutID)
 {
-    if (ExecutionContext* context = eventTarget->executionContext())
+    if (ExecutionContext* context = eventTarget.executionContext())
         DOMTimer::removeByID(context, timeoutID);
 }
 
-void clearInterval(EventTarget* eventTarget, int timeoutID)
+void clearInterval(EventTarget& eventTarget, int timeoutID)
 {
-    if (ExecutionContext* context = eventTarget->executionContext())
+    if (ExecutionContext* context = eventTarget.executionContext())
         DOMTimer::removeByID(context, timeoutID);
 }
 
 } // namespace DOMWindowTimers
 
 } // namespace WebCore